Super Bassman Bluesbreaker 



  • Model No. SBB-550

  • Push-Pull 6L6s On Bassman Channel

  • Push-Pull EL34s On Bluesbreaker Channel

  • 50 Watt - Multi Power Level  1/4 -1/2 - MAX 

  • 4-8-16 Ohm Speaker Switch

  • Bassman & Bluesbreaker Preamps

  • Separate Gains With Bright Switches

  • Deep Bass Switch

  • 3 Band Tone Stack

  • Presence With Edge Boost

  • Buffered Effects Loop

  • Post OT Line Out With Level

  • Tubes: 4 -12AX7, 2-6L6, 2-EL34

"Inspired By Two Of  The Best Guitar Amps Ever Made!"


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The FRENZEL SBB-550 "Super Bassman Bluesbreaker" was "INSPIRED" by the Marshall JTM45 Bluesbreaker.and the Fender 5F6A Bassman, but we added a lot of goodies to make it even better. One of the unique features is that it  uses  a pair of 6L6's for the Bassman warm blues - Jazz tones and  a pair of EL34's for the Bluesbreaker classic rock tones. The tubes are selectable by a switch.  It is truly one of a kind! 


Standard Features:

  • Normal (Type F) Bright (Type M) inputs with separate preamps and Gain controls with Bright pull switches for the unique smooth Fender Bassman warm tones or the Marshall JTM45 great high mid-tones....or you can use an AB-Y switch and create your own distinct tones.

  • Classic Bassman 5F6A style 3-BAND TONE STACK for extended flexibility in shaping your tone.

  • DEEP switch for extended Bass tones. 

  • Master level control so you can crank the GAIN's up and overdrive the preamp without overdriving the output tubes.

  • Presence control  - used to adjust the high-frequency response and damping factor of the power amp section.

  • Boost - Unique NNFB "Edge" boost switch on the PRESENCE control that transforms the power amp section into a No-Negative-FeedBack style amp for soaring dynamic leads. 

  • Effects Loop - pure tube buffered serial effects loop designed to perfectly match the low impedance solid-state pedal levels with high impedance tube levels.

  • Line Out - post output transformer LINE OUT with LINE OUT LEVEL control for recording or driving a power amp, Auto switched internal load to simulate speaker if speaker is  not plugged in. Inject great tone directly into the PA system with the Speaker Simulated Direct Interface.

  • Custom heavy duty output transformer for extended low frequency performance with 4 - 8 - 16 ohm outputs selectable by a rotary switch.

  • FRED  ultra fast high voltage solid-state rectifiers provide sharp pick attack and dynamic bass. 

  • EL34/6L6 Dual Output Tubes  With Selector Switch - Allows you to select 6L6's for great Fender warm tones or EL34's for  great dynamic Marshall dynamic fast pick attack tones. (50 Watt model only.)

  • Standby Switch - Protects tubes from cathode stripping during warm-up

  • Tube Complement: comes standard with 4 - 12AX7, 2 - 6L6, 2 - EL34,  but you can substitute 12AT7's or 12AU7's in the preamp and driver for different tones and overdrive sounds. 


Electrical Specifications: 

  • Input Power  120 VAC 50-60Hz - 175 Watts Standard IEC plug-in three prong grounded power cord. (100VAC & 240VAC available. See Upgrade Options) 

  • Output Tubes - Class AB Push-Pull 6L6's  & Class AB Push-Pull EL34's - Fixed Bias

  • Output Power - 50 watts RMS 

  • Output Power Selector Switch - provides three power levels. 1/4 - 1/2 - FULL power. 

  • Output Transformer Frequency Range -  20-20,000 hz 

  • Speaker Output Impedance - selectable by switch 4-8-16 ohms.

  • Line Out Impedance - 10K ohms

  • Effects Loop Send Impedance - 10K ohms

  • Effects Loop Return Impedance -  470K ohms

  • Instrument Input Impedance - 1 Megohm

Physical Data: 

  • Weight - 27 lbs. 

  • Chassis - Heavy gauge aluminum with welded corners.

  • Retro Vintage Cage Head  - heavy duty lightweight steel mesh cage provides protection and excellent ventilation for tubes. Comes with easy carry Fender style strap handle. Overall  Dimensions - 17" Wide x 12" Deep x 10" High (Includes feet, handle and knobs)

  • Rock solid point-to-point hand wiring with military style tie-wrapped wiring harnesses for long life and reliability.

  • DC on filaments to eliminate 60 hz hum.

  • Star ground system to eliminate induced current chassis noise.

  • Input and Output Jacks isolated from chassis for low noise, eddy currents, and hum.

  • Heavy Duty Toggle Switches

  • Components:  Only the highest quality parts are used including heavy duty transformers, low noise tubular polypropylenes capacitors, metal film resistors, Micalex sockets, Neutrik jacks. All parts are rated for commercial high use conditions. Wherever possible we use parts made in the USA.

  • Front Panel:  F Input Jack, M Input Jack, F Gain/Bright Pull Switch, M Gain/Bright Pull Switch, Bass/Deep Pull Switch, Middle, Treble, Presence/Edge Boost Switch, Standby Power Switch, Pilot Lamp, On/Off Power Switch

  • Rear Panel:   Power Cord Connector, Fuse, EL34/6L6 Output Tube Selector Switch, Effects Loop Return Jack, Effects Loop Send Jack, Output Power Level Switch, Line Out Level, Line Out Jack, Speaker Output Jack, Speaker 4-8-16 Impedance Selector Switch.


 Review By Featured Artist Bob Toriani

Jim - I love this Frenzel 50W Bass amp. Perfect tones for my Hammond and 147 Leslie and my Roland RD 300s!!! Soooo much tone over the solid state I use to use. Very warm and "meaty" sound!! I get many compliments on "that Sound"  Keyboard player.  I now can keep up with the guitars when I'm not miked! Love this amp!!! It's great clean or gritty!!  Thanks for a great products Jim!!!!  Bob T. (Massachusetts)

Customer Video

Customer Reviews

Jim - I heard one of your JF-B45 amps and it sounded amazing!!!  Mark H. (Texas)

Hello Mr. Frenzel: Received the Super Bassman/Bluesbreaker a few hours ago.  Awesome packing job by the way.  I put the tubes in right away and let it warm up.  I have not stopped playing since.  Amazing sounds.  I can’t describe the tones I’m getting out of this.  Its putting my Marshall to shame.  And by the way a Marshall Class 5 Head is an awesome sounding amp.  But this does everything.  So many tones.  And tube options will make the tonal options infinite.  Thank you so much.  I need to get back to work but I can’t stop playing.  Thanks again. Steve E. ( Ontario, Canada) 

Hello: I’m just emailing you again to tell you how much I love this amp.  I’ve had it a couple months now and I can’t stop playing. One week I think the Bassman side is the greatest tone in the world and the next the Bluesbreaker.  Currently I am running KT66’s in it and the tone is unbelievable.  I crank the mids and it is the bluesiest tone ever.  I put a treble boost in front of the bluesbreaker channel and I have instant “Slash” tone.  Amazing.  Thank you so much. Steve E. (Ontario, Canada) 

 Jim - AMAZING AMP!!! GREAT TRANSACTION! - eBay Buyer   auctionsandsuch   7387016279 

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